WO2022121486A1 - Heating system employing natural gas - Google Patents

Heating system employing natural gas Download PDF

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Publication number
WO2022121486A1
WO2022121486A1 PCT/CN2021/122749 CN2021122749W WO2022121486A1 WO 2022121486 A1 WO2022121486 A1 WO 2022121486A1 CN 2021122749 W CN2021122749 W CN 2021122749W WO 2022121486 A1 WO2022121486 A1 WO 2022121486A1
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WO
WIPO (PCT)
Prior art keywords
combustion engine
internal combustion
recovery device
branch
pump unit
Prior art date
Application number
PCT/CN2021/122749
Other languages
French (fr)
Chinese (zh)
Inventor
乔亮
范峻铭
李璐伶
蒋鹏
孟伟
杨光
刘建辉
张姝丽
姜红星
关旭
Original Assignee
深圳市燃气集团股份有限公司
深圳市深燃燃气技术研究院
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Publication of WO2022121486A1 publication Critical patent/WO2022121486A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

Definitions

  • the invention relates to the technical field of natural gas, in particular to a heating system based on natural gas.
  • the current boiler heating systems generally use traditional resources such as coal as combustion resources to provide heating energy, or directly use electric heating.
  • boiler heating systems using traditional resources such as coal have low heating efficiency and large pollution; Hot boiler heating systems generally have the problem of high energy consumption.
  • the technical problem to be solved by the present invention is to provide a heating system based on natural gas in view of the deficiencies of the prior art.
  • a heating system based on natural gas the heating system comprises an internal combustion engine, a generator, a waste heat recovery device and an air source heat pump unit, the internal combustion engine is respectively connected with the waste heat recovery device and the generator; the internal combustion engine The generated flue gas and cylinder jacket water are transmitted to the waste heat recovery device; the internal combustion engine provides energy for the generator to obtain the generator to generate electricity; the generator is connected to the air source heat pump unit, and the air source The heat pump unit provides domestic hot water.
  • the natural gas-based heating system wherein the air source heat pump unit includes a compressor, a hot water heat exchanger and an air heat exchanger; the compressor is connected to the generator, and the compressor, the The hot water heat exchanger and the air heat exchanger are sequentially connected to form a heat exchange circuit.
  • the air source heat pump unit further includes a throttle valve, and the throttle valve is located between the hot water heat exchanger and the air heat exchanger.
  • the natural gas-based heating system wherein the hot water heat exchanger is connected to the domestic water end, and the return water on the recovery side of the domestic water end flows into the hot water heat exchanger, and flows into the domestic water after being heated up by the hot water heat exchanger.
  • the water outlet side of the user end wherein the hot water heat exchanger is connected to the domestic water end, and the return water on the recovery side of the domestic water end flows into the hot water heat exchanger, and flows into the domestic water after being heated up by the hot water heat exchanger.
  • the natural gas-based heating system wherein a first branch and a second branch are arranged between the internal combustion engine and the waste heat recovery device, and the high-temperature flue gas formed by the internal combustion engine flows into the waste heat recovery through the first branch
  • the cylinder jacket water of the internal combustion engine circulates between the internal combustion engine and the waste heat recovery device through the second branch.
  • a flue gas regulating valve is provided on the first branch, so as to adjust the amount of flue gas flowing into the waste heat recovery device through the flue gas regulating valve.
  • the natural gas-based heating system wherein the flue gas regulating valve is connected with a third branch, and the internal combustion engine is connected with the third branch through the flue gas regulating valve, so as to control the inflow of the flue gas through the flue gas regulating valve Flue gas volume of the third branch.
  • the present invention provides a heating system comprising an internal combustion engine, a generator, a waste heat recovery device and an air source heat pump unit, the internal combustion engine is respectively connected with the waste heat recovery device and the power generation device.
  • the flue gas and cylinder jacket water generated by the internal combustion engine are transmitted to the waste heat recovery device;
  • the internal combustion engine provides energy for the generator to obtain the generator to generate electricity;
  • the generator and the air source heat pump The units are connected to provide domestic hot water through the air source heat pump unit.
  • the heating system provided by the invention uses natural hot air as a resource to prepare electric energy to provide energy for the air source heat pump unit, provide domestic hot water through the air source heat pump unit, and absorb the heat in the air through the air heat exchanger in the air source heat pump unit. , so that the energy of the air source heat pump unit can be reduced, thereby reducing the production cost of domestic water.
  • the waste heat formed by the combustion of natural hot gas is recovered through the waste heat recovery device, thereby improving the utilization rate of natural gas.
  • FIG. 1 is a schematic structural diagram of a natural gas-based heating system provided by the present invention.
  • the present invention provides a heating system based on natural gas.
  • the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first”, “second” may expressly or implicitly include one or more of that feature. In the description of the present invention, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • the heating system includes an internal combustion engine 100, a generator 300, a waste heat recovery device 200, and an air source heat pump unit; the internal combustion engine 100 and the The generator 300 is connected, the internal combustion engine 100 is connected with the waste heat recovery device 200, and the generator 300 is connected with the air source heat pump unit.
  • the internal combustion engine 100 provides energy for the generator 300 by burning natural gas, and forms high-temperature flue gas and high-temperature liner water; the high-temperature liner water is transmitted to the waste heat recovery device 200, and is cooled by the waste heat recovery device 200 and then looped back to the internal combustion engine 100 to realize the cylinder liner Recycling of water; the high temperature flue gas generated by the internal combustion engine 100 is transmitted to the waste heat recovery device 200, the waste heat recovery device 200 absorbs the heat in the high temperature flue gas and then removes the high temperature flue gas, and the waste heat recovery device 200 absorbs high temperature cylinder jacket water and high temperature flue gas The carried heat converts the water medium flowing into it into high-temperature water vapor through the absorbed heat, so as to provide high-temperature water vapor for the industry.
  • the generator 300 provides electrical energy for the air source heat pump unit, and the air source heat pump unit provides domestic hot water based on the electrical energy; in this way, a part of the energy generated by the hot weather combustion is converted into electrical energy for the air source heat pump unit to prepare domestic hot water, and a part is passed through the air source heat pump unit to prepare domestic hot water.
  • the high-temperature flue gas and high-temperature cylinder liner water form heat energy, which is absorbed by the waste heat recovery device 200 and used to prepare high-temperature industrial water vapor, which realizes the simultaneous provision of high-temperature water vapor and domestic hot water for the industry, and also improves the utilization of hot air. Rate.
  • the internal combustion engine 100 can also use biogas, syngas, biogas, coal-to-gas, etc. in addition to natural hot gas.
  • the natural hot gas provided in this embodiment is only an example, and other gases that can be used as the gas source of the internal combustion engine 100 can be used as a substitute for the natural gas in this embodiment.
  • the internal combustion engine 100 may be determined according to the gas source used as the internal combustion engine 100 , or the gas source may be determined according to the gas source suitable for the internal combustion engine 100 , and the like.
  • the heating system may include a circuit integrated board, the generator 300 is connected to the circuit integrated board, and the circuit integrated board is connected to the air source heat pump unit and the user terminal, and the generator 300 is connected to the circuit integrated board.
  • the circuit integrated board transmits the electrical energy to the air source heat pump unit and the user terminal.
  • the circuit integrated board provides electrical energy for the air source heat pump unit according to the electricity demand of the air source heat pump unit, and when the electrical energy generated by the generator 300 is greater than the electrical energy required by the air source heat pump unit, the remaining electrical energy can be supplied to the user end, Avoid waste of excess electric energy, so that the utilization rate of electric energy can be improved.
  • the user end may be a user end power grid bus, and the circuit integrated board is connected to the user end power grid bus to transmit electric energy to the power grid.
  • the air source heat pump unit is connected to an external power source, so that the external power source and the circuit integrated board serve as two energy supply ends of the air source heat pump unit, and are based on the power provided by the two energy supply ends.
  • the cost of electric energy is used to determine the energy supply end used by the air source heat pump unit.
  • the cost to determine the energy supply end used by the air source heat pump unit can reduce the cooling cost and increase the flexibility and economic competitiveness of the system.
  • the external power supply can be used as the power supply terminal.
  • the circuit The cost of the power provided by the integrated board is lower than the cost of the power provided by the external power supply, so that the circuit integrated board can be used as the power supply terminal.
  • the internal combustion engine 100 can be controlled to stop working.
  • the air source heat pump unit includes a compressor 401, a hot water heat exchanger 402 and an air heat exchanger 403, the compressor 401 is connected to a circuit integrated board, the compressor 401, the hot water The heat exchanger 402 and the air heat exchanger 403 form a circuit.
  • the compressor 401 is connected with an external power supply and a circuit integrated board, so as to provide electric power for the compressor 401 through the external power supply and the circuit integrated board;
  • heat exchange is performed with the cooling water flowing into the hot water heat exchanger 402, and the domestic hot water after the heat exchange flows out of the hot water heat exchanger 402;
  • the transmission medium of the heat exchanger 402 is transported to the air heat exchanger 403 to exchange heat with the air flowing into the air heat exchanger 403 to absorb heat in the air; the transmission medium flowing through the air heat exchanger 403 returns to the compressor 401, To form a circulation of the transmission medium forming a circuit along the compressor 401 , the hot water heat exchanger 402 and the air heat exchanger 403 .
  • the air source heat pump unit further includes a throttle valve 404, the throttle valve 404 is located between the hot water heat exchanger 402 and the air heat exchanger 403, and the transmission medium flowing out of the hot water heat exchanger 402 passes through.
  • the throttle valve 404 depressurizes, so that the transfer medium flowing into the air heat exchanger 403 through the throttle valve 404 can exchange heat with the air flowing into the air heat exchanger 403 .
  • the hot water heat exchanger 402 is connected to the domestic water end, and the return water at the recovery side of the domestic water end flows into the hot water heat exchanger 402, and then flows into the outlet side of the domestic consumer end after being heated up by the hot water heat exchanger 402;
  • the flowing water exchanges heat with the transmission medium flowing into the hot water heat exchanger 402 through the hot water heat exchanger 402, absorbs the heat in the transmission medium to raise the temperature, and flows into the outlet side of the domestic user end after raising the temperature, so as to provide life for the domestic water end. hot water.
  • the low-temperature and low-pressure transmission medium flows into the compressor 401.
  • the compressor 401 compresses the low-temperature and low-pressure transmission medium to a high-temperature and high-pressure transmission medium, and transmits the high-temperature and high-pressure transmission medium to the hot water heat exchanger 402.
  • the transmission medium exchanges heat with the return water flowing into the hot water heat exchanger 402 in the hot water heat exchanger 402, so that the return water is heated to 30 degrees Celsius to 40 degrees Celsius to provide domestic hot water for the domestic water end; the high temperature and high pressure transmission medium passes through The hot water heat exchanger 402 is converted into a low temperature and high pressure transmission medium; the low temperature and high pressure transmission medium is converted into a low temperature and low pressure transmission medium through the throttle valve 404; The heat exchange is performed, and the heat in the air is absorbed and then transferred to the compressor 401 .
  • a first branch and a second branch are provided between the internal combustion engine 100 and the waste heat recovery device 200 , and the high-temperature flue gas formed by the internal combustion engine 100 flows into the first branch through the first branch.
  • Waste heat recovery device 200, the cylinder jacket water of the internal combustion engine 100 circulates between the internal combustion engine 100 and the waste heat recovery device 200 through a second branch, the second branch is a circulation branch, between the internal combustion engine 100 and the waste heat recovery device 200 A cylinder jacket water circulation branch is formed, and the high-temperature cylinder jacket water formed by the combustion of the internal combustion engine 100 flows into the waste heat recovery device 200 through the second branch, and conducts heat exchange with the water medium flowing into the waste heat recovery device 200 to reduce the temperature.
  • the water is returned to the internal combustion engine 100 through the second branch for cooling the internal combustion engine 100 .
  • the internal combustion engine 100 forms high-temperature flue gas in the process of burning hot air, and the high-temperature flue gas flows into the waste heat recovery device 200 through the first branch, and exchanges heat with the water medium flowing into the waste heat recovery device 200 to reduce the temperature. It is removed through waste heat recovery device 200 . In this way, the heat in the high-temperature flue gas and the high-temperature cylinder liner water can be synchronously recovered through the waste heat recovery device 200, thereby improving the energy utilization rate.
  • the power generation efficiency of the internal combustion engine 100 is greater than 30%, the temperature of the generated high-temperature flue gas is between 400 degrees Celsius and 550 degrees Celsius, and the temperature of the generated high-temperature cylinder jacket water is between 70 degrees Celsius and 85 degrees Celsius;
  • the water medium of the recycler 200 exchanges heat with the high-temperature cylinder jacket water generated by the internal combustion engine 100, and reduces the high-temperature cylinder jacket water by about 15 degrees Celsius, and the reduced cylinder jacket water can be sent back to the internal combustion engine 100 group for cooling the unit;
  • the water medium can further exchange heat with the high-temperature flue gas generated by the internal combustion engine 100 to generate industrial high-temperature steam.
  • the waste heat recovery device 200 may include a first heat exchanger and a second heat exchanger, the first heat exchanger is connected to the second heat exchanger, so The first heat exchanger forms a heat exchange circuit with the casing of the internal combustion engine 100.
  • the first heat exchanger is connected to the flue gas outlet of the internal combustion engine 100, and the water medium flowing into the first heat exchanger passes through the first heat exchanger. After the heat exchanger, it flows into the second heat exchanger, and the outflow from the second heat exchanger is high-temperature steam.
  • the water medium exchanges heat with the high-temperature liner water flowing into the first heat exchanger to heat up, and the heated water medium flows into the second heat exchanger and conducts heat exchange with the high-temperature flue gas flowing into the second heat exchanger. Heat exchange to convert to high temperature water vapor.
  • a flue gas regulating valve 201 is provided on the first branch, so as to adjust the amount of flue gas flowing into the waste heat recovery device 200 through the flue gas regulating valve 201 .
  • the flue gas regulating valve 201 is connected with a third branch, and the internal combustion engine 100 is connected with the third branch through the flue gas regulating valve 201, so as to control the flue gas flowing into the third branch through the flue gas regulating valve 201 quantity.
  • the high-temperature flue gas discharged from the internal combustion engine 100 is divided into the first branch and the third branch by the flue gas regulating valve 201, and the generated heat can be controlled by controlling the amount of flue gas in the first branch and the third branch.
  • the amount of flue gas in the first branch can be increased through the opening of the flue gas regulating valve 201 to provide the required heat for the high-temperature water vapor; on the contrary, when the domestic water end When the required heat load is high, the amount of flue gas in the first branch can be adjusted by the opening of the flue gas regulating valve 201 to provide the required heat for the high-temperature water vapor.
  • the present embodiment provides a heating system including an internal combustion engine, a generator, a waste heat recovery device and an air source heat pump unit, and the internal combustion engine is respectively connected to the waste heat recovery device and the generator;
  • the flue gas and cylinder jacket water generated by the internal combustion engine are transmitted to the waste heat recovery device;
  • the internal combustion engine provides energy for the generator to obtain the generator to generate electricity;
  • the generator is connected to the air source heat pump unit, Domestic hot water is provided by an air source heat pump unit.
  • the heating system provided by the invention uses natural hot air as a resource to prepare electric energy to provide energy for the air source heat pump unit, provide domestic hot water through the air source heat pump unit, and absorb the heat in the air through the air heat exchanger in the air source heat pump unit , so that the energy of the air source heat pump unit can be reduced, thereby reducing the production cost of domestic water.
  • the waste heat formed by the combustion of natural hot gas is recovered through the waste heat recovery device, thereby improving the utilization rate of natural gas.

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Abstract

A heating system employing natural gas. The heating system comprises an internal combustion engine (100), a generator (300), a waste heat recovery device (200) and an air source heat pump unit. The internal combustion engine (100) is respectively connected to the waste heat recovery device (200) and the generator (300). Flue gas and cylinder liner water generated by the internal combustion engine (100) are transmitted to the waste heat recovery device (200). The generator (300) is connected to the air source heat pump unit, and domestic hot water is provided by means of the air source heat pump unit. The heating system employs natural gas as a resource to generate electric energy, and supplies the energy to an air source heat pump unit. Domestic hot water is provided by means of the air source heat pump unit. In addition, an air heat exchanger (403) is used to absorb heat in the air inside the air source heat pump unit, thereby reducing energy consumed by the air source heat pump unit, and reducing the costs incurred in providing domestic water. Moreover, waste heat generated by combustion of natural gas is recovered by means of a waste heat recovery device (200), thereby increasing the use efficiency of the natural gas.

Description

一种基于天然气的制热系统A heating system based on natural gas 技术领域technical field
本发明涉及天然气技术领域，特别涉及一种基于天然气的制热系统。The invention relates to the technical field of natural gas, in particular to a heating system based on natural gas.
背景技术Background technique
随着全球变暖、能源危机和环境污染问题的日益突出，迫切需要推行节能与环保技术。加快开发清洁能源在用户末端的高效利用是促进协调稳定发展，构建清洁低碳、安全高效的现代能源体系的重要路径。With the increasingly prominent problems of global warming, energy crisis and environmental pollution, there is an urgent need to implement energy-saving and environmental protection technologies. Accelerating the development of efficient utilization of clean energy at the end of users is an important way to promote coordinated and stable development and build a clean, low-carbon, safe and efficient modern energy system.
目前的锅炉加热系统普遍使用煤炭等传统资源作为燃烧资源来提供加热能量，或者直接采用电制热的方式，其中，采用煤炭等等传统资源的锅炉加热系统存在制热效率低以及污染大；电制热的锅炉加热系统普遍存在能耗大的问题。The current boiler heating systems generally use traditional resources such as coal as combustion resources to provide heating energy, or directly use electric heating. Among them, boiler heating systems using traditional resources such as coal have low heating efficiency and large pollution; Hot boiler heating systems generally have the problem of high energy consumption.
发明内容SUMMARY OF THE INVENTION
本发明要解决的技术问题在于，针对现有技术的不足，提供一种基于天然气的制热系统。The technical problem to be solved by the present invention is to provide a heating system based on natural gas in view of the deficiencies of the prior art.
为了解决上述技术问题，本发明所采用的技术方案如下：In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is as follows:
一种基于天然气的制热系统，所述制热系统包括内燃机、发电机、余热回收器以及空气源热泵机组，所述内燃机分别与所述余热回收器以及所述发电机相连接；所述内燃机产生的烟气以及缸套水传输至所述余热回收器；所述内燃机为所述发电机提供能量以得到发电机产生电能；所述发电机与所述空气源热泵机组相连接，通过空气源热泵机组提供生活热水。A heating system based on natural gas, the heating system comprises an internal combustion engine, a generator, a waste heat recovery device and an air source heat pump unit, the internal combustion engine is respectively connected with the waste heat recovery device and the generator; the internal combustion engine The generated flue gas and cylinder jacket water are transmitted to the waste heat recovery device; the internal combustion engine provides energy for the generator to obtain the generator to generate electricity; the generator is connected to the air source heat pump unit, and the air source The heat pump unit provides domestic hot water.
所述基于天然气的制热系统，其中，所述空气源热泵机组包括压缩机、热水换热器以及空气换热器；所述压缩机与所述发电机相连接，所述压缩机、所述热水换热器以及空气换热器依次连接形成换热回路。The natural gas-based heating system, wherein the air source heat pump unit includes a compressor, a hot water heat exchanger and an air heat exchanger; the compressor is connected to the generator, and the compressor, the The hot water heat exchanger and the air heat exchanger are sequentially connected to form a heat exchange circuit.
所述基于天然气的制热系统，其中，所述空气源热泵机组还包括节流阀，所述节流阀位于所述热水换热器与所述空气换热器之间。In the natural gas-based heating system, the air source heat pump unit further includes a throttle valve, and the throttle valve is located between the hot water heat exchanger and the air heat exchanger.
所述基于天然气的制热系统，其中，所述热水换热器与生活用水端相连接，生活用水端的回收侧的回流水流入热水换热器，通过热水换热器升温后流入生活用户端的出水侧。The natural gas-based heating system, wherein the hot water heat exchanger is connected to the domestic water end, and the return water on the recovery side of the domestic water end flows into the hot water heat exchanger, and flows into the domestic water after being heated up by the hot water heat exchanger. The water outlet side of the user end.
所述基于天然气的制热系统，其中，所述内燃机与所述余热回收器之间设置有第一支路和第二支路，所述内燃机形成的高温烟气通过第一支路流入余热回收器，所述内燃机的缸套水通过第二支路在内燃机与余热回收器之间循环。The natural gas-based heating system, wherein a first branch and a second branch are arranged between the internal combustion engine and the waste heat recovery device, and the high-temperature flue gas formed by the internal combustion engine flows into the waste heat recovery through the first branch The cylinder jacket water of the internal combustion engine circulates between the internal combustion engine and the waste heat recovery device through the second branch.
所述基于天然气的制热系统，其中，所述第一支路上设置有烟气调节阀，以通过所述烟气调节阀调节流入余热回收器内的烟气量。In the natural gas-based heating system, a flue gas regulating valve is provided on the first branch, so as to adjust the amount of flue gas flowing into the waste heat recovery device through the flue gas regulating valve.
所述基于天然气的制热系统，其中，所述烟气调节阀连接有第三支路，所述内燃机通过烟气调节阀与第三支路相连接，以通过烟气调节阀控制烟气流入第三支路的烟气量。The natural gas-based heating system, wherein the flue gas regulating valve is connected with a third branch, and the internal combustion engine is connected with the third branch through the flue gas regulating valve, so as to control the inflow of the flue gas through the flue gas regulating valve Flue gas volume of the third branch.
有益效果：与现有技术相比，本发明提供了一种所述制热系统包括内燃机、发电机、余热回收器以及空气源热泵机组，所述内燃机分别与所述余热回收器以及所述发电机相连接；所述内燃机产生的烟气以及缸套水传输至所述余热回收器；所述内燃机为所述发电机提供能量以得到发电机产生电能；所述发电机与所述空气源热泵机组相连接，通过空气源热泵机组提供生活热水。本发明提供的制热系统采用天热气作为资源来制备电能为空气源热泵机组提供能量，通过空气源热泵机组提供生活热水，并且在空气源热泵机组内通过空气换热器吸收空气中的热量，从而可以减少空气源热泵机组所处能量，从而可以降低生活用水的生产成本。同时，通过余热回收器回收天热气燃烧所形成的余热，从而提高了天然气的利用率。Beneficial effect: Compared with the prior art, the present invention provides a heating system comprising an internal combustion engine, a generator, a waste heat recovery device and an air source heat pump unit, the internal combustion engine is respectively connected with the waste heat recovery device and the power generation device. The flue gas and cylinder jacket water generated by the internal combustion engine are transmitted to the waste heat recovery device; the internal combustion engine provides energy for the generator to obtain the generator to generate electricity; the generator and the air source heat pump The units are connected to provide domestic hot water through the air source heat pump unit. The heating system provided by the invention uses natural hot air as a resource to prepare electric energy to provide energy for the air source heat pump unit, provide domestic hot water through the air source heat pump unit, and absorb the heat in the air through the air heat exchanger in the air source heat pump unit. , so that the energy of the air source heat pump unit can be reduced, thereby reducing the production cost of domestic water. At the same time, the waste heat formed by the combustion of natural hot gas is recovered through the waste heat recovery device, thereby improving the utilization rate of natural gas.
附图说明Description of drawings
图1为本发明提供的基于天然气的制热系统的结构示意图。FIG. 1 is a schematic structural diagram of a natural gas-based heating system provided by the present invention.
具体实施方式Detailed ways
本发明提供一种基于天然气的制热系统，为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。The present invention provides a heating system based on natural gas. In order to make the purpose, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
需说明的是，当部件被称为“固定于”或“设置于”另一个部件，它可以直接在另一个部件上或者间接在该另一个部件上。当一个部件被称为是“连接于”另一个部件，它可以是直接连接到另一个部件或者间接连接至该另一个部件上。It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
还需说明的是，本发明实施例的附图中相同或相似的标号对应相同或相似的部件；在本发明的描述中，需要理解的是，若有术语“上”、“下”、“左”、“右”等指示的方位或 位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此，附图中描述位置关系的用语仅用于示例性说明，不能理解为对本专利的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。It should also be noted that the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "lower" The orientation or positional relationship indicated by "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific Therefore, the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration and should not be construed as a limitation on this patent. For those of ordinary skill in the art, the Understand the specific meaning of the above terms.
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多该特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.
下面结合附图，通过对实施例的描述，对发明内容作进一步说明。In the following, the content of the invention will be further illustrated by describing the embodiments with reference to the accompanying drawings.
本实施例提供了一种基于天然气的制热系统，如图1所示，所述制热系统包括内燃机100、发电机300、余热回收器200以及空气源热泵机组；所述内燃机100与所述发电机300相连接，所述内燃机100与所述余热回收器200相连接，发电机300与空气源热泵机组相连接。内燃机100通过燃烧天然气为发电机300提供能量，并形成高温烟气以及高温缸套水；高温缸套水传输至余热回收器200，通过余热回收器200降温后回路到内燃机100，以实现缸套水的循环利用；内燃机100产生的高温烟气传输至余热回收器200，余热回收器200吸收高温烟气中的热量后将高温烟气排除，余热回收器200吸收高温缸套水和高温烟气携带的热量，通过吸收的热量将流入其内的水介质转换为高温水蒸气，以为工业提供高温水蒸气。所述发电机300为空气源热泵机组提供电能，空气源热泵机组基于该电能提供生活热水；这样天气热燃烧所产生的能量一部分转换为电能用于空气源热泵机组制备生活热水，一部分通过高温烟气以及高温缸套水形成热能，并通过余热回收器200吸收而用于制备工业高温水蒸气，实现了同步为工业提供高温水蒸气以及提供生活热水，同时也提高了天热气的利用率。This embodiment provides a heating system based on natural gas. As shown in FIG. 1 , the heating system includes an internal combustion engine 100, a generator 300, a waste heat recovery device 200, and an air source heat pump unit; the internal combustion engine 100 and the The generator 300 is connected, the internal combustion engine 100 is connected with the waste heat recovery device 200, and the generator 300 is connected with the air source heat pump unit. The internal combustion engine 100 provides energy for the generator 300 by burning natural gas, and forms high-temperature flue gas and high-temperature liner water; the high-temperature liner water is transmitted to the waste heat recovery device 200, and is cooled by the waste heat recovery device 200 and then looped back to the internal combustion engine 100 to realize the cylinder liner Recycling of water; the high temperature flue gas generated by the internal combustion engine 100 is transmitted to the waste heat recovery device 200, the waste heat recovery device 200 absorbs the heat in the high temperature flue gas and then removes the high temperature flue gas, and the waste heat recovery device 200 absorbs high temperature cylinder jacket water and high temperature flue gas The carried heat converts the water medium flowing into it into high-temperature water vapor through the absorbed heat, so as to provide high-temperature water vapor for the industry. The generator 300 provides electrical energy for the air source heat pump unit, and the air source heat pump unit provides domestic hot water based on the electrical energy; in this way, a part of the energy generated by the hot weather combustion is converted into electrical energy for the air source heat pump unit to prepare domestic hot water, and a part is passed through the air source heat pump unit to prepare domestic hot water. The high-temperature flue gas and high-temperature cylinder liner water form heat energy, which is absorbed by the waste heat recovery device 200 and used to prepare high-temperature industrial water vapor, which realizes the simultaneous provision of high-temperature water vapor and domestic hot water for the industry, and also improves the utilization of hot air. Rate.
在本实施例的一个实现方式中，内燃机100除了可以采用天热气外，还可以采用沼气、合成气、生物燃气以及煤制气等。本实施例中提供的天热气仅是一个例子，其他可以作为内燃机100的气源的气体均可以作为替换本实施例中的天然气。当然，在实际应用中，所述内燃机100可以根据作为内燃机100的气源而确定，或者气源可以根据内燃机100所适用的气源而确定等。In an implementation manner of this embodiment, the internal combustion engine 100 can also use biogas, syngas, biogas, coal-to-gas, etc. in addition to natural hot gas. The natural hot gas provided in this embodiment is only an example, and other gases that can be used as the gas source of the internal combustion engine 100 can be used as a substitute for the natural gas in this embodiment. Of course, in practical applications, the internal combustion engine 100 may be determined according to the gas source used as the internal combustion engine 100 , or the gas source may be determined according to the gas source suitable for the internal combustion engine 100 , and the like.
在本实施例的一个实现方式中，所述制热系统可以包括电路集成板，所述发电机300与所述电路集成板相连接，电路集成板与空气源热泵机组以及用户端相连接，通过电路集成板将电能传输至空气源热泵机组以及用户端。所述电路集成板根据空气源热泵机组 的用电需求为空气源热泵机组提供电能，并且当发电机300产生的电能大于空气源热泵机组所需的电能时，可以将剩余电能供给给用户端，避免多余电能浪费，从而可以提高电能的利用率。在本实施例的一个实现方式，所述用户端可以为用户端电网母线，电路集成板与用户端电网母线相连接，以将电能传输至电网中。In an implementation of this embodiment, the heating system may include a circuit integrated board, the generator 300 is connected to the circuit integrated board, and the circuit integrated board is connected to the air source heat pump unit and the user terminal, and the generator 300 is connected to the circuit integrated board. The circuit integrated board transmits the electrical energy to the air source heat pump unit and the user terminal. The circuit integrated board provides electrical energy for the air source heat pump unit according to the electricity demand of the air source heat pump unit, and when the electrical energy generated by the generator 300 is greater than the electrical energy required by the air source heat pump unit, the remaining electrical energy can be supplied to the user end, Avoid waste of excess electric energy, so that the utilization rate of electric energy can be improved. In an implementation manner of this embodiment, the user end may be a user end power grid bus, and the circuit integrated board is connected to the user end power grid bus to transmit electric energy to the power grid.
在本实施例的一个实现方式中，所述空气源热泵机组连接外部电源，以使得外部电源和电路集成板作为空气源热泵机组的两个供能端，并基于两个供能端所提供的电能的成本来确定空气源热泵机组所采用的供能端，其中，空气源热泵机组所采用的供能端为两个供能端所提供的电能的成本低的供能端，这样基于电能的成本来确定空气源热泵机组所采用的供能端，可以降低制冷成本，增加系统的灵活性和经济竞争力。在一个具体实现方式中，由于当电价处于波谷时段时，电路集成板提供的电能的成本高于外部电源提供的电能成本，从而可以采用外部电源作为供能端，当电价处于波峰时段时，电路集成板提供的电能的成本低于外部电源提供的电能成本，从而可以采用电路集成板作为供能端。此外，在实际应用中，在采用外部电源作为供能端时，可以控制内燃机100停止工作。In an implementation of this embodiment, the air source heat pump unit is connected to an external power source, so that the external power source and the circuit integrated board serve as two energy supply ends of the air source heat pump unit, and are based on the power provided by the two energy supply ends. The cost of electric energy is used to determine the energy supply end used by the air source heat pump unit. The cost to determine the energy supply end used by the air source heat pump unit can reduce the cooling cost and increase the flexibility and economic competitiveness of the system. In a specific implementation, since the cost of the power provided by the circuit integrated board is higher than the cost of the power provided by the external power supply when the electricity price is in the trough period, the external power supply can be used as the power supply terminal. When the electricity price is in the peak period, the circuit The cost of the power provided by the integrated board is lower than the cost of the power provided by the external power supply, so that the circuit integrated board can be used as the power supply terminal. In addition, in practical applications, when an external power source is used as the power supply terminal, the internal combustion engine 100 can be controlled to stop working.
在一个实现方式中，所述空气源热泵机组包括压缩机401、热水换热器402以及空气换热器403，所述压缩机401与电路集成板相连接，所述压缩机401、热水换热器402以及空气换热器403形成回路。压缩机401与外部电源以及电路集成板相连接，以通过外部电源以及电路集成板为压缩机401提供电能；压缩机401与热水换热器402相连接，通过压缩机401压缩的传输介质传输至热水换热器402，在热水换热器402中与流入热水换热器402的冷却水进行热交换，经过热交换的生活热水流出热水换热器402；经过热水换热器402的传输介质通过传输至空气换热器403，与流入空气换热器403的空气进行热交换，以吸收空气中热量；流经空气换热器403的传输介质回流到压缩机401，以形成传输介质沿压缩机401、热水换热器402以及空气换热器403形成回路的循环。In one implementation, the air source heat pump unit includes a compressor 401, a hot water heat exchanger 402 and an air heat exchanger 403, the compressor 401 is connected to a circuit integrated board, the compressor 401, the hot water The heat exchanger 402 and the air heat exchanger 403 form a circuit. The compressor 401 is connected with an external power supply and a circuit integrated board, so as to provide electric power for the compressor 401 through the external power supply and the circuit integrated board; To the hot water heat exchanger 402, in the hot water heat exchanger 402, heat exchange is performed with the cooling water flowing into the hot water heat exchanger 402, and the domestic hot water after the heat exchange flows out of the hot water heat exchanger 402; The transmission medium of the heat exchanger 402 is transported to the air heat exchanger 403 to exchange heat with the air flowing into the air heat exchanger 403 to absorb heat in the air; the transmission medium flowing through the air heat exchanger 403 returns to the compressor 401, To form a circulation of the transmission medium forming a circuit along the compressor 401 , the hot water heat exchanger 402 and the air heat exchanger 403 .
所述空气源热泵机组还包括节流阀404，所述节流阀404位于所述热水换热器402与所述空气换热器403之间，热水换热器402流出的传输介质通过节流阀404进行降压，以使得通过节流阀404流入空气换热器403的传输介质可以与流入空气换热器403的空气进行热交换。此外，所述热水换热器402与生活用水端相连接，生活用水端的回收侧的回流水流入热水换热器402，通过热水换热器402升温后流入生活用户端的出水侧；回流水通过热水换热器402与流入热水换热器402的传输介质进行热交换，吸收传输介 质中的热量以提升温度，提升温度后的流入生活用户端的出水侧，以为生活用水端提供生活热水。The air source heat pump unit further includes a throttle valve 404, the throttle valve 404 is located between the hot water heat exchanger 402 and the air heat exchanger 403, and the transmission medium flowing out of the hot water heat exchanger 402 passes through. The throttle valve 404 depressurizes, so that the transfer medium flowing into the air heat exchanger 403 through the throttle valve 404 can exchange heat with the air flowing into the air heat exchanger 403 . In addition, the hot water heat exchanger 402 is connected to the domestic water end, and the return water at the recovery side of the domestic water end flows into the hot water heat exchanger 402, and then flows into the outlet side of the domestic consumer end after being heated up by the hot water heat exchanger 402; The flowing water exchanges heat with the transmission medium flowing into the hot water heat exchanger 402 through the hot water heat exchanger 402, absorbs the heat in the transmission medium to raise the temperature, and flows into the outlet side of the domestic user end after raising the temperature, so as to provide life for the domestic water end. hot water.
在一个具体实现方式中，流入压缩机401内为低温低压传输介质，压缩机401将低温低压传输介质压缩至高温高压传输介质，并将高温高压传输介质传输至热水换热器402，高温高压传输介质在热水换热器402中与流入热水换热器402的回流水进行热交换，使得回流水升温至30摄氏度-40摄氏度，以为生活用水端提供生活热水；高温高压传输介质经过热水换热器402转换为低温高压传输介质；低温高压传输介质经过节流阀404转换为低温低压传输介质；低温低压传输介质在空气换热器403中与流入空气换热器403中的空气进行热交换，吸收空气中的热量后传输至压缩机401。In a specific implementation, the low-temperature and low-pressure transmission medium flows into the compressor 401. The compressor 401 compresses the low-temperature and low-pressure transmission medium to a high-temperature and high-pressure transmission medium, and transmits the high-temperature and high-pressure transmission medium to the hot water heat exchanger 402. The transmission medium exchanges heat with the return water flowing into the hot water heat exchanger 402 in the hot water heat exchanger 402, so that the return water is heated to 30 degrees Celsius to 40 degrees Celsius to provide domestic hot water for the domestic water end; the high temperature and high pressure transmission medium passes through The hot water heat exchanger 402 is converted into a low temperature and high pressure transmission medium; the low temperature and high pressure transmission medium is converted into a low temperature and low pressure transmission medium through the throttle valve 404; The heat exchange is performed, and the heat in the air is absorbed and then transferred to the compressor 401 .
在本实施例的一个实现方式中，所述内燃机100与所述余热回收器200之间设置有第一支路和第二支路，所述内燃机100形成的高温烟气通过第一支路流入余热回收器200，所述内燃机100的缸套水通过第二支路在内燃机100与余热回收器200之间循环，所述第二支路为循环支路，内燃机100与余热回收器200之间形成缸套水循环支路，内燃机100燃起形成的高温缸套水通过第二支路流入余热回收器200，与流入余热回收器200的水介质进行热交换以降低温度，降低温度后的缸套水通过第二支路回流到内燃机100以用于冷却内燃机100。内燃机100在燃烧天热气的过程中形成高温烟气，高温烟气通过第一支路流入余热回收器200，与流入余热回收器200的水介质进行热交换以降低温度，降低温度后的烟气通过余热回收器200排除。这样可以通过余热回收器200同步回收高温烟气以及高温缸套水中的热量，提高了能源利用率。In an implementation of this embodiment, a first branch and a second branch are provided between the internal combustion engine 100 and the waste heat recovery device 200 , and the high-temperature flue gas formed by the internal combustion engine 100 flows into the first branch through the first branch. Waste heat recovery device 200, the cylinder jacket water of the internal combustion engine 100 circulates between the internal combustion engine 100 and the waste heat recovery device 200 through a second branch, the second branch is a circulation branch, between the internal combustion engine 100 and the waste heat recovery device 200 A cylinder jacket water circulation branch is formed, and the high-temperature cylinder jacket water formed by the combustion of the internal combustion engine 100 flows into the waste heat recovery device 200 through the second branch, and conducts heat exchange with the water medium flowing into the waste heat recovery device 200 to reduce the temperature. The water is returned to the internal combustion engine 100 through the second branch for cooling the internal combustion engine 100 . The internal combustion engine 100 forms high-temperature flue gas in the process of burning hot air, and the high-temperature flue gas flows into the waste heat recovery device 200 through the first branch, and exchanges heat with the water medium flowing into the waste heat recovery device 200 to reduce the temperature. It is removed through waste heat recovery device 200 . In this way, the heat in the high-temperature flue gas and the high-temperature cylinder liner water can be synchronously recovered through the waste heat recovery device 200, thereby improving the energy utilization rate.
在一个具体实现方式中，内燃机100发电效率大于30％，产生的高温烟气的温度在400摄氏度-550摄氏度之间，产生的高温缸套水的温度在70摄氏度-85摄氏度之间；流入余热回收器200的水介质与内燃机100产生的高温缸套水进行换热，并且使得高温缸套水降低15摄氏度左右，降低后的缸套水可重新送回内燃机100组用于冷却机组；升温后的水介质可以进一步同内燃机100产生的高温烟气换热，生成工业高温蒸汽。In a specific implementation, the power generation efficiency of the internal combustion engine 100 is greater than 30%, the temperature of the generated high-temperature flue gas is between 400 degrees Celsius and 550 degrees Celsius, and the temperature of the generated high-temperature cylinder jacket water is between 70 degrees Celsius and 85 degrees Celsius; The water medium of the recycler 200 exchanges heat with the high-temperature cylinder jacket water generated by the internal combustion engine 100, and reduces the high-temperature cylinder jacket water by about 15 degrees Celsius, and the reduced cylinder jacket water can be sent back to the internal combustion engine 100 group for cooling the unit; The water medium can further exchange heat with the high-temperature flue gas generated by the internal combustion engine 100 to generate industrial high-temperature steam.
基于此，在本实施例的一个实现方式中，所述余热回收器200可以包括第一换热器和第二换热器，所述第一换热器与第二换热器相连接，所述第一换热器与所述内燃机100的套缸形成换热回路，所述第一换热器与内燃机100的烟气出口相连接，流入第一换热器的水介质，经过第一换热器后流入第二换热器，第二换热器流出的为高温水蒸气。可以理解的是，水介质与流入第一换热器的高温缸套水进行热交换以升温，升温后的水介质流入第二换热器，并与流入第二换热器的高温烟气进行热交换以转换为高温水蒸气。Based on this, in an implementation manner of this embodiment, the waste heat recovery device 200 may include a first heat exchanger and a second heat exchanger, the first heat exchanger is connected to the second heat exchanger, so The first heat exchanger forms a heat exchange circuit with the casing of the internal combustion engine 100. The first heat exchanger is connected to the flue gas outlet of the internal combustion engine 100, and the water medium flowing into the first heat exchanger passes through the first heat exchanger. After the heat exchanger, it flows into the second heat exchanger, and the outflow from the second heat exchanger is high-temperature steam. It can be understood that the water medium exchanges heat with the high-temperature liner water flowing into the first heat exchanger to heat up, and the heated water medium flows into the second heat exchanger and conducts heat exchange with the high-temperature flue gas flowing into the second heat exchanger. Heat exchange to convert to high temperature water vapor.
在本实施例的一个实现方式中，所述第一支路上设置有烟气调节阀201，以通过所述烟气调节阀201调节流入余热回收器200内的烟气量。所述烟气调节阀201连接有第三支路，所述内燃机100通过烟气调节阀201与第三支路相连接，以通过烟气调节阀201控制烟气流入第三支路的烟气量。这样通过烟气调节阀201将内燃机100排出的高温烟气分成第一支路和第三支路，并通过控制第一支路和第三支路的烟气量，可以控制生成热量。例如，当生活用水端所需热量负荷低时，可通过烟气调节阀201的开度来调大第一支路的烟气量，以为高温水蒸气提供所需热量；反之，当生活用水端所需热量负荷高时，可通过烟气调节阀201的开度来调小第一支路的烟气量，以为高温水蒸气提供所需热量。In an implementation manner of this embodiment, a flue gas regulating valve 201 is provided on the first branch, so as to adjust the amount of flue gas flowing into the waste heat recovery device 200 through the flue gas regulating valve 201 . The flue gas regulating valve 201 is connected with a third branch, and the internal combustion engine 100 is connected with the third branch through the flue gas regulating valve 201, so as to control the flue gas flowing into the third branch through the flue gas regulating valve 201 quantity. In this way, the high-temperature flue gas discharged from the internal combustion engine 100 is divided into the first branch and the third branch by the flue gas regulating valve 201, and the generated heat can be controlled by controlling the amount of flue gas in the first branch and the third branch. For example, when the heat load required by the domestic water end is low, the amount of flue gas in the first branch can be increased through the opening of the flue gas regulating valve 201 to provide the required heat for the high-temperature water vapor; on the contrary, when the domestic water end When the required heat load is high, the amount of flue gas in the first branch can be adjusted by the opening of the flue gas regulating valve 201 to provide the required heat for the high-temperature water vapor.
综上所述，本实施例提供了一种所述制热系统包括内燃机、发电机、余热回收器以及空气源热泵机组，所述内燃机分别与所述余热回收器以及所述发电机相连接；所述内燃机产生的烟气以及缸套水传输至所述余热回收器；所述内燃机为所述发电机提供能量以得到发电机产生电能；所述发电机与所述空气源热泵机组相连接，通过空气源热泵机组提供生活热水。本发明提供的制热系统采用天热气作为资源来制备电能为空气源热泵机组提供能量，通过空气源热泵机组提供生活热水，并且在空气源热泵机组内通过空气换热器吸收空气中的热量，从而可以减少空气源热泵机组所处能量，从而可以降低生活用水的生产成本。同时，通过余热回收器回收天热气燃烧所形成的余热，从而提高了天然气的利用率。To sum up, the present embodiment provides a heating system including an internal combustion engine, a generator, a waste heat recovery device and an air source heat pump unit, and the internal combustion engine is respectively connected to the waste heat recovery device and the generator; The flue gas and cylinder jacket water generated by the internal combustion engine are transmitted to the waste heat recovery device; the internal combustion engine provides energy for the generator to obtain the generator to generate electricity; the generator is connected to the air source heat pump unit, Domestic hot water is provided by an air source heat pump unit. The heating system provided by the invention uses natural hot air as a resource to prepare electric energy to provide energy for the air source heat pump unit, provide domestic hot water through the air source heat pump unit, and absorb the heat in the air through the air heat exchanger in the air source heat pump unit , so that the energy of the air source heat pump unit can be reduced, thereby reducing the production cost of domestic water. At the same time, the waste heat formed by the combustion of natural hot gas is recovered through the waste heat recovery device, thereby improving the utilization rate of natural gas.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

  1. 一种基于天然气的制热系统，其特征在于，所述制热系统包括内燃机、发电机、余热回收器以及空气源热泵机组，所述内燃机分别与所述余热回收器以及所述发电机相连接；所述内燃机产生的烟气以及缸套水传输至所述余热回收器；所述内燃机为所述发电机提供能量以得到发电机产生电能；所述发电机与所述空气源热泵机组相连接，通过空气源热泵机组提供生活热水。A heating system based on natural gas, characterized in that, the heating system comprises an internal combustion engine, a generator, a waste heat recovery device and an air source heat pump unit, and the internal combustion engine is respectively connected with the waste heat recovery device and the generator ; The flue gas and cylinder jacket water generated by the internal combustion engine are transmitted to the waste heat recovery device; the internal combustion engine provides energy for the generator to obtain the generator to generate electricity; the generator is connected with the air source heat pump unit , providing domestic hot water through air source heat pump units.
  2. 根据权利要求1所述基于天然气的制热系统，其特征在于，所述空气源热泵机组包括压缩机、热水换热器以及空气换热器；所述压缩机与所述发电机相连接，所述压缩机、所述热水换热器以及空气换热器依次连接形成换热回路。The natural gas-based heating system according to claim 1, wherein the air source heat pump unit comprises a compressor, a hot water heat exchanger and an air heat exchanger; the compressor is connected to the generator, The compressor, the hot water heat exchanger and the air heat exchanger are sequentially connected to form a heat exchange circuit.
  3. 根据权利要求2所述基于天然气的制热系统，其特征在于，所述空气源热泵机组还包括节流阀，所述节流阀位于所述热水换热器与所述空气换热器之间。The natural gas-based heating system according to claim 2, wherein the air source heat pump unit further comprises a throttle valve, and the throttle valve is located between the hot water heat exchanger and the air heat exchanger. between.
  4. 根据权利要求2所述基于天然气的制热系统，其特征在于，所述热水换热器与生活用水端相连接，生活用水端的回收侧的回流水流入热水换热器，通过热水换热器升温后流入生活用户端的出水侧。The natural gas-based heating system according to claim 2, wherein the hot water heat exchanger is connected to the domestic water end, and the return water on the recovery side of the domestic water end flows into the hot water heat exchanger, and the hot water exchange After the heater heats up, it flows into the outlet side of the domestic user end.
  5. 根据权利要求1所述基于天然气的制热系统，其特征在于，所述内燃机与所述余热回收器之间设置有第一支路和第二支路，所述内燃机形成的高温烟气通过第一支路流入余热回收器，所述内燃机的的缸套水通过第二支路在内燃机与余热回收器之间循环。The natural gas-based heating system according to claim 1, wherein a first branch and a second branch are arranged between the internal combustion engine and the waste heat recovery device, and the high-temperature flue gas formed by the internal combustion engine passes through the first branch and the second branch. One branch flows into the waste heat recovery device, and the cylinder jacket water of the internal combustion engine circulates between the internal combustion engine and the waste heat recovery device through the second branch channel.
  6. 根据权利要求5所述基于天然气的制热系统，其特征在于，所述第一支路上设置有烟气调节阀，以通过所述烟气调节阀调节流入余热回收器内的烟气量。The natural gas-based heating system according to claim 5, wherein a flue gas regulating valve is provided on the first branch, so as to adjust the amount of flue gas flowing into the waste heat recovery device through the flue gas regulating valve.
  7. 根据权利要求6所述基于天然气的制热系统，其特征在于，所述烟气调节阀连接有第三支路，所述内燃机通过烟气调节阀与第三支路相连接，以通过烟气调节阀控制烟气流入第三支路的烟气量。The natural gas-based heating system according to claim 6, wherein the flue gas regulating valve is connected with a third branch, and the internal combustion engine is connected with the third branch through the flue gas regulating valve, so as to pass the flue gas The regulating valve controls the amount of flue gas flowing into the third branch.
PCT/CN2021/122749 2020-12-08 2021-10-09 Heating system employing natural gas WO2022121486A1 (en)

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